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n型有机半导体材料研究进展

已有 1874 次阅读 2018-3-13 12:24 |个人分类:Physical Science|系统分类:论文交流

      有机半导体是各类光电设备中非常重要的一种材料。然而n型有机半导体(电子传输)的开发远远落后与p型(孔穴传输)有机半导体。近日,来自中国科学院长春应用化学研究所的研究团队开发了一种方式,利用硼氮配位键(B←N)设计n型有机半导体。研究者们合成了一种新的n型并苯,具有最低未占有分子轨道能量级和n型特性。这篇文章发表在近期出版的《德国应用化学》上,点击文章标题阅读原文。

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n-Type Azaacenes Containing B←N Units
Yang Min,Chuandong Dou,* Hongkun Tian, Yanhou Geng, Jun Liu,* and Lixiang Wang

Abstract

We disclose a novel strategy to design n-type acenes through the introduction of boron–nitrogen coordination bonds (B←N). We synthesized two azaacenes composed of two B←N units and six/eight linearly annelated rings. The B←N unit significantly perturbed the electronic structures of the azaacenes: Unique LUMOs delocalized over the entire acene skeletons and decreased aromaticity of the B←N-adjacent rings. Most importantly, these B←N-containing azaacenes exhibited low-lying LUMO energy levels and high electron affinities, thus leading to n-type character. The solution-processed organic field-effect transistor based on one such azaacene exhibited unipolar n-type characteristics with an electron mobility of 0.21 cm2 V−1 s−1.



http://blog.sciencenet.cn/blog-822310-1103667.html

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